This patch has used in MXE: https://github.com/mxe/mxe https://github.com/mxe/mxe/blob/master/src/aspell.mk...
Small fix for compile aspell in mingw.
According to the ChangeLog, the MinGW support has been dropped. Too bad! JsonRpc-Cpp...
failure build for Windows
Replace #ifndef WIN32 to #ifndef _WIN32